Metamorphic Rocks

All rocks whether igneous or sedimentary may become metamorphic or changed rocks under great heat and pressure. Their original character and appearance may be greatly altered by such forces, particularly during intense earth movements. In this manner, clay may be metamorphosed into slate, limestone into marble, sandstone into quartzite, granite into gneiss, shale into schist and coal into graphite.

Sedimentary Rocks

Sedimentary rocks are formed from sediment accumulated over long periods, usually under water. They are distinguished from the other rock types by their characteristic layer formation and are termed stratified rocks. The strata may vary in thickness from a few centimetres to many metres. The rocks may be coarse or fine-grained, soft or hard. The materials that form sedimentary rocks may be brought by streams, glaciers, winds or even animals. They are non-crystalline and often contain fossils of animals, plants and other micro-organisms. Sedimentary rocks are thus the most varied in their formation of all rocks. Sedimentary rocks are classified according to their age and different kinds of rocks formed during the same period are grouped together. It is

Igneous Rocks

Igneous rocks are formed by the cooling and solidification of molten rock (magma) from beneath the earth's crust. They are normally crystalline in structure. They do not occur in strata (layers) nor do they contain fossils. Igneous rocks may be subdivided on the basis of mineral composition. When they contain a high proportion of silica they are said to be acid. Acid igneous rocks, such as granite, are less dense and are lighter in colour than basic rocks. These contain a greater proportion of basic of basic oxides, e.g. of iron, aluminum or magnesium, and are thus denser and darker in colour.
In terms of origin there are two main classes of

The Classification Of Rocks

Rock Texture, Structure and Colour

Rock texture refers to the sizes of the mineral grains, that is, whether the rock is fine grained or coarse grained, dense glass or frothy glass. The texture of an igneous rock varies according to the environment in which solidification took place. Very rapid cooling of lava at the earth's surface results in a glassy texture. Moderately rapid cooling produces fine texture, while coarse textures are as a result of slow or gradual cooling of molten rock deep down in the crust. Textures of sedimentary rocks are recognizable on the basis of the size of the constituent grains and the minerals contained. Shale is a sedimentary rock formed from mud or clay and it is made up of particles of sand size 0.02mm - 2.00mm.
The colours of rocks are essentially a consequence of the minerals which make up the roc

ASUP Strike Federal Government turns blind eyes and deaf ears

Since April, 2013 it has been "strike" "resume" "strike" for ASUP. I will classify the strike action in sections (section A and B). The section A of the strike lasted for three ugly months i.e. from April, 2013 to July, 2013 due to the Senate's intervention, when they promised to wade into the controversy and solve it, but we all saw what happened, "the senate disappeared and was nowhere to be found like the missing Malaysian airplane". The section B of the strike was activated (a sort of reactivation of section A) on October, 2013 till date! How many months now? Do the calculation yourself. Our Education Minister, Nyesom Wike and our President, Dr. Goodluck Jonathan are happy and comfortable with the strike.

When a problem surfaces, a coward runs, but a brave man challenges, controls and solves it.
Since this current and on-going strike of ASUP began, our so called minister of education and the Federal government have done almost nothing to address it. The minister is not even interested in knowing what led to the strike, not to talk of tackling it. He is a disgrace to the Nigerian Polytechnics, Education sector and Nigeria at large. He is not sensitive enough to be in that position as a minister of Education, he terrorises our students, in fact he may be called a "terrorist". Instead of listening to the aggrieved Polytechnic lecturers and reason with them for possible solution to the matter, he is busy attacking them and spreading false information to Nigerians pretending to be solving the issue. Is that what a genuine leader should be doing? Lets think straight here, who are the ones suffering in this battle created by Wike? Our Children, the students, the ones to take over from us. Is this strike neglected because it is the Polytechnics, ASUP that is involved? Is it that what ASUP asks is too much or cannot be tackled? Because to my knowledge, more than 75% of their demand does not involve money, they are just problems killing the Polytechnic Education of this Nation. All the words which have been coming out of the ministers mouth since this strike started were empty and full of deceit and insincerity. He is a coward.
As for the President, Dr? Goodluck Jonathan, he is totally not showing concern, he turned a deaf ear to ASUP and Federal Polytechnics in general. Rather than addressing this strike, he is busy campaigning and preparing for re-election come 2015. I do not know why we keep having cowards as our leaders. May God help this Nation. If this nation is tired of Polytechnic education, let it be erased, if this nation still needs the Polytechnic education, let it be well nurtured and respected.

Whatever problem or monster we created today must surely hunt us or even destroy us tomorrow, whether we like it or not it is a simple truth. Mr. President, Mr. Minister, Please, we beg you in the name of God, let our children, students go back to school, we know your kids are not there but for the sake of this nation, please do your work, that is why you are there.

Emecee
Fed Poly, Oko.